Ironically, this will need to be heavily marketed. And I don't know how you'd market this through legal channels
Discussion
I have done so in a small way on FB and Gumtree.
I haven't made use of my fully legal and disclosed backdoor for anything, though.
But at scale, I could.
Just not sure its worthwhile. Cheap disposable junk laptops from China are so cheap, and consumers so unwary...